Pregnancy symptoms but still get periods?

Me and my boyfriend have only had about 5 times, 4 unproteced but he pulled out and I am on birthcontrol. My last 2 periods I've gotten on time but they've only been like 2 days long. I also had a spotting type thing a week after my last period but that's because I missed two pills. I have taken 2 tests both negative but I woke up today felling very sick. Ive had some cramping as well and feel bloated, could I be pregnant? I don't know what to do cause all the test say no but I keep worrying about it, help!